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            <h1>MNISTとのWGAN-GP実験</h1>

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            <div class="highlight"><pre><span class="lineno">10</span><span></span><span class="kn">import</span> <span class="nn">torch</span>
<span class="lineno">11</span>
<span class="lineno">12</span><span class="kn">from</span> <span class="nn">labml</span> <span class="kn">import</span> <span class="n">experiment</span><span class="p">,</span> <span class="n">tracker</span></pre></div>
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            <p><a href="../experiment.html">ワッサーシュタインの実験から構成をインポートする</a></p>

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        <div class='code'>
            <div class="highlight"><pre><span class="lineno">14</span><span class="kn">from</span> <span class="nn">labml_nn.gan.wasserstein.experiment</span> <span class="kn">import</span> <span class="n">Configs</span> <span class="k">as</span> <span class="n">OriginalConfigs</span></pre></div>
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            <p></p>

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            <div class="highlight"><pre><span class="lineno">16</span><span class="kn">from</span> <span class="nn">labml_nn.gan.wasserstein.gradient_penalty</span> <span class="kn">import</span> <span class="n">GradientPenalty</span></pre></div>
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            <h2>設定クラス</h2>
<p><a href="../../original/experiment.html">オリジナルのGAN実装を拡張し</a>、ディスクリミネーター（クリティック）損失計算をオーバーライドして勾配ペナルティを含めました。</p>

        </div>
        <div class='code'>
            <div class="highlight"><pre><span class="lineno">19</span><span class="k">class</span> <span class="nc">Configs</span><span class="p">(</span><span class="n">OriginalConfigs</span><span class="p">):</span></pre></div>
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            <p>グラデーションペナルティ係数 <span ><span class="katex"><span aria-hidden="true" class="katex-html"><span class="base"><span class="strut" style="height:0.69444em;vertical-align:0em;"></span><span class="mord mathnormal">λ</span></span></span></span></span></p>

        </div>
        <div class='code'>
            <div class="highlight"><pre><span class="lineno">28</span>    <span class="n">gradient_penalty_coefficient</span><span class="p">:</span> <span class="nb">float</span> <span class="o">=</span> <span class="mf">10.0</span></pre></div>
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    <div class='section' id='section-5'>
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                <a href='#section-5'>#</a>
            </div>
            <p></p>

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        <div class='code'>
            <div class="highlight"><pre><span class="lineno">30</span>    <span class="n">gradient_penalty</span> <span class="o">=</span> <span class="n">GradientPenalty</span><span class="p">()</span></pre></div>
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    <div class='section' id='section-6'>
        <div class='docs doc-strings'>
            <div class='section-link'>
                <a href='#section-6'>#</a>
            </div>
            <p>これは元のディスクリミネーター損失計算よりも優先され、勾配ペナルティも含まれます。</p>

        </div>
        <div class='code'>
            <div class="highlight"><pre><span class="lineno">32</span>    <span class="k">def</span> <span class="nf">calc_discriminator_loss</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">data</span><span class="p">:</span> <span class="n">torch</span><span class="o">.</span><span class="n">Tensor</span><span class="p">):</span></pre></div>
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                <a href='#section-7'>#</a>
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            <p><span ><span class="katex"><span aria-hidden="true" class="katex-html"><span class="base"><span class="strut" style="height:0.43056em;vertical-align:0em;"></span><span class="mord coloredeq eqe" style=""><span class="mord mathnormal" style="">x</span></span></span></span></span></span>グラデーションペナルティを計算するにはグラデーションをオンにする必要があります</p>

        </div>
        <div class='code'>
            <div class="highlight"><pre><span class="lineno">38</span>        <span class="n">data</span><span class="o">.</span><span class="n">requires_grad_</span><span class="p">()</span></pre></div>
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    <div class='section' id='section-8'>
        <div class='docs'>
            <div class='section-link'>
                <a href='#section-8'>#</a>
            </div>
            <p>[サンプル] <span ><span class="katex"><span aria-hidden="true" class="katex-html"><span class="base"><span class="strut" style="height:0.43056em;vertical-align:0em;"></span><span class="mord mathnormal" style="margin-right:0.04398em;">z</span><span class="mspace" style="margin-right:0.2777777777777778em;"></span><span class="mrel">∼</span><span class="mspace" style="margin-right:0.2777777777777778em;"></span></span><span class="base"><span class="strut" style="height:1em;vertical-align:-0.25em;"></span><span class="mord mathnormal">p</span><span class="mopen">(</span><span class="mord mathnormal" style="margin-right:0.04398em;">z</span><span class="mclose">)</span></span></span></span></span></p>

        </div>
        <div class='code'>
            <div class="highlight"><pre><span class="lineno">40</span>        <span class="n">latent</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">sample_z</span><span class="p">(</span><span class="n">data</span><span class="o">.</span><span class="n">shape</span><span class="p">[</span><span class="mi">0</span><span class="p">])</span></pre></div>
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    <div class='section' id='section-9'>
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                <a href='#section-9'>#</a>
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            <p><span ><span class="katex"><span aria-hidden="true" class="katex-html"><span class="base"><span class="strut" style="height:1em;vertical-align:-0.25em;"></span><span class="mord mathnormal" style="margin-right:0.02778em;">D</span><span class="mopen">(</span><span class="mord coloredeq eqe" style=""><span class="mord mathnormal" style="">x</span></span><span class="mclose">)</span></span></span></span></span></p>

        </div>
        <div class='code'>
            <div class="highlight"><pre><span class="lineno">42</span>        <span class="n">f_real</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">discriminator</span><span class="p">(</span><span class="n">data</span><span class="p">)</span></pre></div>
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    <div class='section' id='section-10'>
        <div class='docs'>
            <div class='section-link'>
                <a href='#section-10'>#</a>
            </div>
            <p><span ><span class="katex"><span aria-hidden="true" class="katex-html"><span class="base"><span class="strut" style="height:1em;vertical-align:-0.25em;"></span><span class="mord mathnormal" style="margin-right:0.02778em;">D</span><span class="mopen">(</span><span class="mord"><span class="mord mathnormal">G</span><span class="msupsub"><span class="vlist-t vlist-t2"><span class="vlist-r"><span class="vlist" style="height:0.33610799999999996em;"><span style="top:-2.5500000000000003em;margin-left:0em;margin-right:0.05em;"><span class="pstrut" style="height:2.7em;"></span><span class="sizing reset-size6 size3 mtight"><span class="mord mathnormal mtight" style="margin-right:0.02778em;">θ</span></span></span></span><span class="vlist-s">​</span></span><span class="vlist-r"><span class="vlist" style="height:0.15em;"><span></span></span></span></span></span></span><span class="mopen">(</span><span class="mord mathnormal" style="margin-right:0.04398em;">z</span><span class="mclose">))</span></span></span></span></span></p>

        </div>
        <div class='code'>
            <div class="highlight"><pre><span class="lineno">44</span>        <span class="n">f_fake</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">discriminator</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">generator</span><span class="p">(</span><span class="n">latent</span><span class="p">)</span><span class="o">.</span><span class="n">detach</span><span class="p">())</span></pre></div>
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    <div class='section' id='section-11'>
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                <a href='#section-11'>#</a>
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            <p>ディスクリミネーターロスを取得</p>

        </div>
        <div class='code'>
            <div class="highlight"><pre><span class="lineno">46</span>        <span class="n">loss_true</span><span class="p">,</span> <span class="n">loss_false</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">discriminator_loss</span><span class="p">(</span><span class="n">f_real</span><span class="p">,</span> <span class="n">f_fake</span><span class="p">)</span></pre></div>
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    <div class='section' id='section-12'>
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                <a href='#section-12'>#</a>
            </div>
            <p>トレーニングモードでのグラデーションペナルティの計算</p>

        </div>
        <div class='code'>
            <div class="highlight"><pre><span class="lineno">48</span>        <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">mode</span><span class="o">.</span><span class="n">is_train</span><span class="p">:</span>
<span class="lineno">49</span>            <span class="n">gradient_penalty</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">gradient_penalty</span><span class="p">(</span><span class="n">data</span><span class="p">,</span> <span class="n">f_real</span><span class="p">)</span>
<span class="lineno">50</span>            <span class="n">tracker</span><span class="o">.</span><span class="n">add</span><span class="p">(</span><span class="s2">&quot;loss.gp.&quot;</span><span class="p">,</span> <span class="n">gradient_penalty</span><span class="p">)</span>
<span class="lineno">51</span>            <span class="n">loss</span> <span class="o">=</span> <span class="n">loss_true</span> <span class="o">+</span> <span class="n">loss_false</span> <span class="o">+</span> <span class="bp">self</span><span class="o">.</span><span class="n">gradient_penalty_coefficient</span> <span class="o">*</span> <span class="n">gradient_penalty</span></pre></div>
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    </div>
    <div class='section' id='section-13'>
        <div class='docs'>
            <div class='section-link'>
                <a href='#section-13'>#</a>
            </div>
            <p>それ以外の場合はグラデーションペナルティをスキップ</p>

        </div>
        <div class='code'>
            <div class="highlight"><pre><span class="lineno">53</span>        <span class="k">else</span><span class="p">:</span>
<span class="lineno">54</span>            <span class="n">loss</span> <span class="o">=</span> <span class="n">loss_true</span> <span class="o">+</span> <span class="n">loss_false</span></pre></div>
        </div>
    </div>
    <div class='section' id='section-14'>
        <div class='docs'>
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                <a href='#section-14'>#</a>
            </div>
            <p>ログのもの</p>

        </div>
        <div class='code'>
            <div class="highlight"><pre><span class="lineno">57</span>        <span class="n">tracker</span><span class="o">.</span><span class="n">add</span><span class="p">(</span><span class="s2">&quot;loss.discriminator.true.&quot;</span><span class="p">,</span> <span class="n">loss_true</span><span class="p">)</span>
<span class="lineno">58</span>        <span class="n">tracker</span><span class="o">.</span><span class="n">add</span><span class="p">(</span><span class="s2">&quot;loss.discriminator.false.&quot;</span><span class="p">,</span> <span class="n">loss_false</span><span class="p">)</span>
<span class="lineno">59</span>        <span class="n">tracker</span><span class="o">.</span><span class="n">add</span><span class="p">(</span><span class="s2">&quot;loss.discriminator.&quot;</span><span class="p">,</span> <span class="n">loss</span><span class="p">)</span>
<span class="lineno">60</span>
<span class="lineno">61</span>        <span class="k">return</span> <span class="n">loss</span></pre></div>
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    <div class='section' id='section-15'>
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            <div class='section-link'>
                <a href='#section-15'>#</a>
            </div>
            
        </div>
        <div class='code'>
            <div class="highlight"><pre><span class="lineno">64</span><span class="k">def</span> <span class="nf">main</span><span class="p">():</span></pre></div>
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    <div class='section' id='section-16'>
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            <div class='section-link'>
                <a href='#section-16'>#</a>
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            <p>コンフィグオブジェクトの作成</p>

        </div>
        <div class='code'>
            <div class="highlight"><pre><span class="lineno">66</span>    <span class="n">conf</span> <span class="o">=</span> <span class="n">Configs</span><span class="p">()</span></pre></div>
        </div>
    </div>
    <div class='section' id='section-17'>
        <div class='docs'>
            <div class='section-link'>
                <a href='#section-17'>#</a>
            </div>
            <p>実験を作成</p>

        </div>
        <div class='code'>
            <div class="highlight"><pre><span class="lineno">68</span>    <span class="n">experiment</span><span class="o">.</span><span class="n">create</span><span class="p">(</span><span class="n">name</span><span class="o">=</span><span class="s1">&#39;mnist_wassertein_gp_dcgan&#39;</span><span class="p">)</span></pre></div>
        </div>
    </div>
    <div class='section' id='section-18'>
        <div class='docs'>
            <div class='section-link'>
                <a href='#section-18'>#</a>
            </div>
            <p>オーバーライド設定</p>

        </div>
        <div class='code'>
            <div class="highlight"><pre><span class="lineno">70</span>    <span class="n">experiment</span><span class="o">.</span><span class="n">configs</span><span class="p">(</span><span class="n">conf</span><span class="p">,</span>
<span class="lineno">71</span>                       <span class="p">{</span>
<span class="lineno">72</span>                           <span class="s1">&#39;discriminator&#39;</span><span class="p">:</span> <span class="s1">&#39;cnn&#39;</span><span class="p">,</span>
<span class="lineno">73</span>                           <span class="s1">&#39;generator&#39;</span><span class="p">:</span> <span class="s1">&#39;cnn&#39;</span><span class="p">,</span>
<span class="lineno">74</span>                           <span class="s1">&#39;label_smoothing&#39;</span><span class="p">:</span> <span class="mf">0.01</span><span class="p">,</span>
<span class="lineno">75</span>                           <span class="s1">&#39;generator_loss&#39;</span><span class="p">:</span> <span class="s1">&#39;wasserstein&#39;</span><span class="p">,</span>
<span class="lineno">76</span>                           <span class="s1">&#39;discriminator_loss&#39;</span><span class="p">:</span> <span class="s1">&#39;wasserstein&#39;</span><span class="p">,</span>
<span class="lineno">77</span>                           <span class="s1">&#39;discriminator_k&#39;</span><span class="p">:</span> <span class="mi">5</span><span class="p">,</span>
<span class="lineno">78</span>                       <span class="p">})</span></pre></div>
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    </div>
    <div class='section' id='section-19'>
        <div class='docs'>
            <div class='section-link'>
                <a href='#section-19'>#</a>
            </div>
            <p>実験を開始してトレーニングループを実行する</p>

        </div>
        <div class='code'>
            <div class="highlight"><pre><span class="lineno">81</span>    <span class="k">with</span> <span class="n">experiment</span><span class="o">.</span><span class="n">start</span><span class="p">():</span>
<span class="lineno">82</span>        <span class="n">conf</span><span class="o">.</span><span class="n">run</span><span class="p">()</span>
<span class="lineno">83</span>
<span class="lineno">84</span>
<span class="lineno">85</span><span class="k">if</span> <span class="vm">__name__</span> <span class="o">==</span> <span class="s1">&#39;__main__&#39;</span><span class="p">:</span>
<span class="lineno">86</span>    <span class="n">main</span><span class="p">()</span></pre></div>
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